2 min readWarningBank of England banking taxonomy 4.1.1Updated 11 November 2026

Detailed information on securitisations by approach (CR SEC Details 2): a total must equal the sum of its parts (SC14.01.01.01, Bank of England check boe_b0124_ss)

A warning on the detailed information on securitisations by approach (CR SEC Details 2) template (SC14.01.01.01), in the own funds for SDDTs (PRA116) return.

Line4 Check runs it on the own funds for SDDTs (PRA116) return, proven on test files, check by check: the same outcome on all three test files of that return.

The rule in plain words

In Detailed information on securitisations by approach (CR SEC Details 2) (SC14.01.01.01): the sum of "SENIOR" (column 0340), "MEZZANINE" (column 0350) and "First loss" (column 0360) must equal the sum of "Direct credit substitutes" (column 0370), "IRS / CRS" (column 0380), "Liquidity facilities" (column 0390) and "OTHER" (column 0400).

The headline gives only the template and the kind of check, because the rule is too long to say in a headline. The plain words above say all of it.

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Add up the parts in your return and compare the result with the total.
  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.
  4. 04The Bank of England allows a small rounding difference, worked out from the decimals each value is reported with.
  5. 05It runs only when your filing indicators mark SC14.01.01 as reported.
  6. 06This is a warning. It does not stop the return on its own, but your supervisor may ask you to explain it.

The cells it reads

Detailed information on securitisations by approach (CR SEC Details 2) (SC14.01.01.01)

Columns

  • C0340SENIOR
  • C0350MEZZANINE
  • C0360First loss
  • C0370Direct credit substitutes
  • C0380IRS / CRS
  • C0390Liquidity facilities
  • C0400OTHER

Sheets

  • S0010Standardised approach for securitisations (SEC-SA)
  • S0020External ratings-based approach for securitisation positions (SEC-ERBA)
  • S00401250% for positions not subject to any method

Which returns it applies to

Line4 Check runs it on the own funds for SDDTs (PRA116) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds for SDDTs (PRA116) returns, as a warning.

The Bank’s own words and formula

The plain words above spell out the Bank’s formula, with each cell named from its templates. In the Bank of England’s list of validations, word for word:

[boe_b0124_ss];[scope({t: SC14.01.01.01, z:0010;0020;0040})];[{t: SC14.01.01.01, c: 0340} + {t: SC14.01.01.01, c: 0350} + {t: SC14.01.01.01, c: 0360} = {t: SC14.01.01.01, c: 0370} + {t: SC14.01.01.01, c: 0380} + {t: SC14.01.01.01, c: 0390} + {t: SC14.01.01.01, c: 0400}]
Show the formulaShow

The Bank of England's formula. Cells are written as {t: table, r: row, c: column}.

{t: SC14.01.01.01, c: 0340} + {t: SC14.01.01.01, c: 0350} + {t: SC14.01.01.01, c: 0360} = {t: SC14.01.01.01, c: 0370} + {t: SC14.01.01.01, c: 0380} + {t: SC14.01.01.01, c: 0390} + {t: SC14.01.01.01, c: 0400}

Where it applies, in the Bank's words (its scope):

scope({t: SC14.01.01.01, z:0010;0020;0040, f: banking, fv: banking_reporting_sddt})

Every PRA banking rule on SC14.01.01.01

Checks like this one, run at the point of submission, are the first step to real-time supervision. Line4 builds SupTech software for financial regulators that runs checks like these as each return arrives.